Computing scale



(No Model.) 2 Sheets-Sheet 1. W. R. DUNN.

COMPUTING SCALE.

No. 588,526. Patented Aug. 17,1897.

f W ATTORNEYS.

(No Model.) 2 Sheets-Sheet W. R. DUNN.

COMPUTING SCALE.

N0. 588,526. Patented Aug. 17,1897.

W/TNESSES: /NVENTOH M ATTORNEYS.

UNITED STATES PATENT OFFICE.

VILLIAM R. DUNN, OF ALTON, INDIANA, ASSIGNOR TO IIIMSELF, JOI-IN T. IIOLLOROFT, TEMPLE II. DUNN, LYOURGUS HARRISON, AND ABRAHALWI N. PEOKINPAUGI-I, OF SAME PLACE.

COM PUTlNG-SCALE.

SPECIFICATION forming part of Letters Patent No. 588,526, dated August 17, 1897.

Application led March 14, 1895. Serial No. 541,676. (No model.)

To all whom t may concern: ing B and also forming a journal whereon Be it known that l, WILLIAM R. DUNN, of turns the price-indicating beam C, located Alton, in the county of Crawford and State of inside the casing B, as clearly seen in the Indiana, have invented certain new and usedrawings. The beam C comprises a tubular ful Improvements in Computing-Scales, of rotative body having longitudinal guides c 55 which the following is a full, clear, and exact formed on its inside, and inside the said body description. is mounted to slide on said guides c amovrIhis invention relates to certain improveable weight or counterpoise D, having at one ments iu that class of computing` or price-inside a projecting tubular extension d, jourio dicating weighing-scales wherein a movable naled to rotate ou the bearing-luga, as clearly 6o weight is adapted to traverse two beams, one seen in Fig. 3. The extension d projects of which is graduated toiudicate pounds aud through the outer end of the casing B and ounces and the ot-her of whichis graduated to forms a handle for the manipulation of the indicate the price per pound in cents of the rotative price-indicating beam O and also of substance being weighed; and the object of the sliding counterpoise D, being provided at 65 the invention is to provide a device of this its extremity with a milled head d. character of a simplified and improved con- The beam C is provided on its periphery struction which shall present certain features with longitudinal series of graduations E, as of novelty and advantages for use over simiclearly seen in Figs. 2 and 4, and at one end 2o lar devices heretofore employed, all as will of the beam an index-character e is printed 7o be hereinafter fully set forth. at the end of each series of grad nations, said The novel features of the invention will be character e being made to indicate the price carefully defined in the claims. per pound of the materials in the weighing In the accompanying drawings, illustrating out of which its particular series of graduathe invention, Figure l is an elevation of the tions E is to be used. 75 beam of a computing-scale embodying my im- There may be any desired number of grad uprovements, and Fig. 2isa vertical longitudiations E, and in Fig. 4 I have shown the innal section taken through the same. Fig. 3 dex-characters c of said series running from is a vertical cross-section taken through the 3,in cheating three cents per pound, to 35,

3o beam on the line 3 3 in Fig. l, showing the indicating thirty-tive cents perpound; butit 8o sliding weight in place on t-he same; and Fig. is evident thatsaid indexes e may be increased 4 is a stretch-out showing a portion of the or varied as may be desired. graduations on the periphery of the price- The casing B, which constitutes the weighindicating beam. Fig. 5 is a side elevation ing-beam, is provided in its side with a lon gi- 3 5 of a weighing-scale of ordinary construction, tudinal slot l) of su flicient width to expose at 8 5 having a platform for weighing articles in one time but one of the longitudinal series of bull; and a scoop for weighing small quangraduations E on beam C, together with the tities and provided with my improvements. index-character e of said series, and along op- In the views, A represents the beam of a posite sides of said slot, at the top and bot- 40 weighing-scale II, which may be of any detom thereof, as seen in Fig. l, graduated 9o sired construction, being preferably of that scales F F are secured to the side of the casclass of scales which are provided with indeing, the upper scale F being graduated into pendent supports for articles to be weighedpounds and ounces and the lower scale F' beas, for example, a platform 7i for weighing in ing graduated into pounds and half-pounds,

bulk and a scoop h for weighing small quanas seen in Fig. l, and each of said scales F F' 7o tities. extends along the side of the slot from the At its extremity the beam A is provided iirst graduation of the series E on beam C, as with a projecting lug or stud a, circular in seen at the left in Fig. l, to the opposite end cross-section, as seen in Fig. 3, supporting at of the slot.

5o its inner end the inner end of a tubular cas- The casing B is provided at opposite sides roo with longitudinal guides b', and a weight or pea G is mounted to slide on said casing, being guided by said guides b and provided at its front portion with index-fingers g g', adapted, as said weight is slid along the casing, to play along the respective scales F F thereon. At its lower part the-pea G is provided with an eye (2 to receive an auxiliary weight, whereby the weight of said pea may be increased or diminished, and at the end of the casing B is formed a similar eye b2 to support a similar weight in a well-known way. The scale F is designed for use with articles to be weighed in the scoop, and the scale F' is designed for use with articles to be weighed on the platform. In using the device the handle d is manipulated to rotate the beam C far enough to bring the index c thereon which corresponds to the price per pound of the article to be weighed into position to be seen through the slot Z7 in casing B. For example, if it is desired to weigh out ten cents worth of sugar at three cents a pound the beam C is turned until the index 3 and its corresponding scale E appear at the slot b, whereupon the pea G is slid along until its index g corresponds with the graduation at l0 on the scale E. The sugar is lhen placed in the scoop of the scale, and when the same has been balanced a glance at the scale F shows that the index g on the pea G indicates three pounds three and a third ounces on said scale, giving the weight of the sugar without necessitating any computation on the part of the operator.

lVhen it is desired to weigh articles in bulk, the article is placed on the platform and the pea G is slid along to the proper position to effect a balance. The counterpoise D may be employed for balancing articles placed in Vthe scoop of the scale-as. for example, when a plate or dish is placed therein to hold articles sold by weight. To effect this, the handle cZ-is manipulated to draw the counterpoise D over to the right in the casing until the dish in the scoop is balanced. The counterpoise D may also be employed to balance the article in the pan after it has been weighed when it is desired to mix different articles. The use of said counterpoise for this purpose will be apparent.

I do not wish to be understood as limiting myself to the exact arrangement and construction of the device as herein set forth, since it is evident that the same is susceptible of some modification without departing` from the principles of the invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- l. In a weighing-scale, the combination of a beam having a stud projecting from its end, a tubular casing secured on the end of said beam concentric with and surrounding said stud, and provided with a longitudinal slot and a series of grad nations adjacent thereto, a weight slidablc along said casing, a tubular price-indicating beam rotatively mounted on said stud inside the said casingand provided with a series of graduations arranged t0 appear at the slot in -the casing, said priceindicating beam having a guide formed longitudinally along it, a counterpoise engaging said guide and slidable therealong, and a handle secured to said counterpoise, substantially as set forth.

2. In a computing-scale, having independent supports for articles to be weighed, the combination of a hollow weighing-lieam having a longitudinal opening` formed in it and provided at the side of said opening with two series of grad nations marked on it and adapted for use, respectively, with the respective independent supports, a price -indicating beam arranged to turn in the hollow of the weighing-beam and provided with a plurality of price-indicatin g grad nations adapted when the beam is turned to appear at the opening in the weighing-beam, and a weight arranged to slide along the weighing-beam and provided with indexes to traverse the respective scales on the weighing-beam and the scale on the price-indicating beam at the opening in the weighing-beam, substantially as set forth.

3. In a computing-scale, the combination of a hollow weighing-beam, having a longitudinal slot and graduations along the same and having bearings at its opposite ends, a price-indicating beam mounted to turn in the hollow of the weighing-beam on said bearings, and having a plurality of price-indicating graduations adapted when the price-indicating beam is turned, to appear at the slot in the weighing-beam, a handle mounted to move longitudinally of the price-indical ing beam but arranged to turn with the same whereby the said beam may be rotated, said handle projecting from the said beam and being adapted when moved longitudinally to vary the adjustment of lhe scale, and a weight arranged to slide along-the weighingbeam and having indexes to traverse the scales on the same and on the price-indicating beam at the opening in the Weighingbeam, substantially as set forth.

et. In a weighing-scale, the combination of a hollow rotatively-mounted beam having a longitudinal internal guide, a counterpoise slidingly mounted in said beam engaging said guide and held against turning in said beam thereby, and a handle fixed to said counter- 'poise and adapted when turned to turn the beam and when moved longitudinally, to slide said counterpoise in the hollow of the beam and vary the ad j ustment of the scale, substantially as set forth.

VILLIAM R. DUNN. lVitnesses:

JOHN T. HoLLoRoFT, EDWARD A. HoLLcRoFr.

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